Trailer wiring adapter



FIG. 1 is a perspective view of a trailer wiring adapter showing our new design;

FIG. 2 is a top plan view of the adapter;

FIG. 3 is a first side elevation view of the adapter;

FIG. 4 is a second side elevation view of the adapter;

FIG. 5 is a third side elevation view of the adapter;

FIG. 6 is a fourth side elevation view of the adapter; and,

FIG. 7 is a bottom plan view of the adapter. 

The ornamental design for a trailer wiring adapter, as shown and described. 